Commercial ZrO2 paints as coatings for SiGe thermoelectric materials |
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| Authors: | T Amano B J Beaudry K A Gschneidner Jr F C Laabs |
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| Affiliation: | (1) Ames Laboratory and Department of Materials Science and Engineering, Iowa State University, 50011 Ames, Iowa, USA;(2) Present address: Sagami Institute of Technology, Tsujido-Nishikaigan Fujisawa, 251 Kanagawa, Japan |
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| Abstract: | The use of ZrO2 paints to coat SiGe materials used in radioisotopic thermoelectric generators was studied. The best results were obtained when the SiGe alloys were double coated with a 200 h anneal at 1000° C after each coating. The thermoelectric properties of these coated samples were about the same as for the SiGe alloys coated by SiO2 or Si3N4. The vapoursupression properties of the best ZrO2 coatings fell between those of SiO2 and Si3N4. In the SiGe doped with GaP alloys, the interface between the oxide coating and alloy is enriched with Ga2O3. |
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